Achondroplasia (dwarfism) is caused by a dominant allele. a woman and a man both with dwarfism marry (aaxaa). if individuals homozygous for achondroplasia (aa) are not viable (death of embryo), what would be the genotypes, phenotypes and phenotypic ratios expected in the progeny? what if a dwarf female (aa) mates with a normal height male (aa)?

Genotypes of offspring: AA, Aa, Aa and aa

Phenotypes: Possibility that 3 out of 4 offspring will have dwarfism, there is a 1 out of 4 chance that one of the offspring will be homozygous dominant for Achondroplasia and will not be viable

The phenotypic ratio is: 3:1 for the offspring having the phenotype

Explanation:

due to the fact that it skipped a generation we can tell it is definitely not a dominant trait, therefore it must be recessive. i think this is right let me know!

explanation: